The failure to agree with the European Union means that there is an increasingly hard time period before British Parliament could make a "meaningful final vote" on May's deal before the European Union summit scheduled for December 13-14.

But Boris Johnson tore into "stage managed delays" to the Brexit process, saying people should not be "fooled by this theatre" and a "surrender" by the government is imminent.

Former foreign secretary Boris Johnson - who had not seen the text of the deal - signalled his intention to vote against it.

"There won't be a deal today but we're pushing hard to get it over the line tomorrow", a Whitehall source told BI.

Political leaders in Northern Ireland have given a mixed reaction to a deal being agreed in the Brexit negotiations.

Mrs May will face resistance from Tory Brexiters like Boris Johnson and Jacob Rees-Mogg who fear that a deal could tie the United Kingdom indefinitely to Brussels, following rules which it has no part in shaping.

A British official voiced pessimism about the possibility of a breakthrough with the European Union this week due to continued deadlock on the issue of the border between British-ruled Northern Ireland and European Union member Ireland.

Brexit will pitch the world's fifth largest economy into the unknown and many fear it will help to divide the West as it grapples with both the unconventional presidency of Donald Trump and growing assertiveness from Russian Federation and China.

But until now, all that has been agreed is a need for a backstop, so this deal should clarify how it'll be achieved.

The Prime Minister's spokesman said that he expected the Cabinet would continue to back Mrs May in the Brexit negotiations.

The EU said Tuesday it was proposing visa-free travel for United Kingdom citizens on short trips, even if there is no deal - but only if Britain reciprocates.

Downing Street said talks had gone through the night - lasting until 2.45am this morning, with still "substantial issues to overcome".

Elaborating on the deal, "The backstop will come in the form of a temporary UK-wide customs arrangement, with specific provisions for Northern Ireland, which go deeper on the issue of customs and alignment on the rules of the single market than for the rest of the UK", RTÉ News' Europe Editor Tony Connelly wrote.

Lawmakers say they will vote against the deal.

Trade Secretary Liam Fox, Leadsom, and Mordaunt "all campaigned with us for Brexit and need to stop this from ever reaching the Commons", the MP said.

Most Labour MPs are set to vote against it, as well as Conservative MPs from the pro-Brexit and pro-EU wings of the party, and possibly the 10 MPs from the Democratic Unionist Party which props up May's government. He suggested the DUP might withdraw its support for May's government if that was the case.

Lidington, who voted to stay in the European Union in the 2016 referendum, declined to say whether the proposed deal would make the United Kingdom wealthier or poorer, saying that the people had made a decision to leave the EU.